Lamp socket



Sept. 25, 1923. l 1,469,038

L. ERlKsoN LAMP SOCKET Patented Sept. 25, i923a naires stares meeste ierstes.

LEONARD ERIKSON, OF MALDEN, MASSACHUSETTS.

LAMP socxjnr.

Application filed .Tune 5,

and useful Improvement in Lamp Sockets,

of which the following is a specification.

My invention relates to incandescent lamp sockets and more especially insockets adapted for use in show-case reflectors, and its object,generally speaking, is to improve and simplify the construction of thesame in the manner hereinafter set forth. 1

Specifically my object is to provide a twopart socket, the members ofwhich may be clamped together and used for two lamps, or one member ofwhich may be clamped to a base for useV with aV single lamp; to providesimple means fory clamping the members of the socket together; and toprovide means for attaching the socket to theV reT flcctor. l

n With these objects in view my invention contemplates. the use of twojuxtaposed blocks of insulating material, one or both of which havelamp-receiving chambers at their outer ends, and longitudinally alignedside recesses, a bridge in each side recess and means electrically andmechanically connecting one bridge with one or both of the threadedmetallic tubes placed in said chamber or chambers for receiving thelamps, and other means electrically and mechanically connecting theother bridge to one or both of the spring contact members lwhich makecontact with the central terminal ofthe lamps, together lwith means,such as an elongated nut in a longitudinally extending recess in one ofthe socket members and longitudinally disposed screws passing throughsaid members and engaging said nut for clamping the socket memberstogether, and means forsecuring thesocket tothe reflector orothersupport, such as a flat nut in a laterial recessin one socket member anda screw threaded to said-nut land having its head projecting above thesocket.

j My invention will be bestY understood by reference to the drawingsywhich accompany and form av part of this specification in which YFigure 1 is a vertical longitudinal section of a double socket and showcase reflector embodying my invention, said section being taken on theline 1 1 of Fig. 4. lFig. @is an end view. Figs, 33nd 4 are trans- 1920.senti m4386376?.

verseV sections taken on the lines'B-S and 4 4 respectively. Fig.l 5 isa horizontal longitudinal section taken on the line 5 5. Fig. 6 is avertical Alr'mgitudinal section of a single reflector embodying myinvention, the section being taken on the line 6 6. Fig.

7 is an end view of the base end of the socket shown in Fig. 6. Fig. 8is an end. view of the chambered end of l In the particular drawingsVselected for more fully disclosing the principle of my invention 10represents the' top member of the reflector which as shown in myapplication Serial No.`386,768 filed simultaneously the socket shown inherewith is substantially horizontal when in use, 11 is thesubstantially vertical' side member of said reflector and 12 thedownturned end portion' in which the top meinber terminates. A conduithaving' its base 13 resting on the reflector and the ends of its sidemembers 14 resting on the reflector is suitablysecured to thelatter, asforexv ample, by screws 14 which pass through the reflector and arethreadedto'the base of the conduit in the' manner disclosed in myapplication aforesaid, although it will be understood that any suitablemeans may be employed. Vfor this purpose. A saddle 15 having its topportion disposed opposite and parallel to the'base of the conduit andtheends of its side members resting on the latter so that a space ,isprovided for electrical .conductors between said base and saddle, isclamped to the socket by the screw Altthe end of which is threaded tothe flat nut 17 in a lateral lrecess vin one of the are connectedy tothe ,conductors in said j socket, vas these features Yhave been" claimedin my application above-.referred to.

As shownin Fig. l'myuimproved socket consists of two blocks ofinsulating material 30, 31,. the latter]beingmprovjded withan axialrecess and the former with a correspondingly shaped projection 32fitting therein. Theouter ends of each block receive thethreadedmetallic tubes 34 and the spring contact members 35, 3Grespectivelyr which make contact in the usual manner with thecylindrical surface and the vcentral terminal of an incandescent-lampplug. For the purpose of mechanically connecting the two blocks as wellas electrically connecting the metallic tubes and spring clips respectively l employ'metallic bridges located in the side recesses and screwswhich cooperate with the latter and with the respective blocks. Thescrew 37 passes through the block 30, its head enga-ging the tube 34 andits end being threaded to one end of the bridge 38V in the side recess39 of the lblock 31, and the screw 40 passes through the block 31, itshead engaging the tube 33 and its end being threaded to the other end ofthe bridge 38. The screw 41 passes through the block 31, its headengaging the spring ycontact member 35 and its end being threaded to oneend of the bridge 42 located in the side recess 43 of the block 30, andthe screw 44 passes through the block 30, its head engaging the springcontact member 36 and its end being threaded to the other end of thebridge 42.

While the arrangement above described.

joins the two sockets mechanically I prefer to strengthen the structureby means of an elongated n nut 45 in a longitudinally extendingFK recessof the block 31 andthe longitudinally disposed screws 46 and'47 whichpass through the lower portions of the blocks 30 and 31 respectively,the heads of said Y screws engaging the tubes 34, 33 respectively.

. Conducting clips 48, 49 are soldered to the bridges 38, 42respectively for receiving the conductors 18, 19 respectively.

InFig. 6 the base 50 is provided with a side recess 51 in alignment withthe recess 43 of the block 3() and receives the bridge 38 i the ends ofwhich are threaded to receive screws 37 and 40 which pass through Vsaidblock and said base respectively. In this case the base and block aremechanically Y joined by the bridge 38 and its co-operating screws whilethe tube 34 is electrically connected to said bridge and the springcontact member 36 is electrically connected to the bridge 42 bythe screw44 Vas in the case of the double socket shown in Fig. 1. The base andblock 30 are clamped together by means of the nut 45 and the screws 46and 47.

' It will be apparent that the block 30 shown in Fig. 6 as clamped to abase to form a single socket is identical with thecorrespondinglynumbered element shown in Fig. 1 as clamped to a similarblock for the purpose of lmaking a double socket.

Each block, and also the base 50 is provided witha projection 52 whichfits into the slot 53` cut into the base of the conduit member 13 forproperly positioning the socket with respect to the latter. The inner1surfaces ofl said projections are beveled inwardly las shown at 54 toprevent a sharp bend in the conductors as they pass from the conduit tothe clips 48, 49, respectively.

After the conductors have been soldered to their clips the side recesses39, 43 or 51, 43, as the case may be, are filled with insulating cement.d

It will be understood'that while I have described one illustrativeembodiment of my invention with some particularity, variousmodifications may be *made therein withoutdeparting from the scope of myinvention as set forth in the appended claims.

I claim:

1. A show-case-reiector lamp-socket comprising in combination two blocksof insulating material, the juxtaposed inner ends ot said blocks beingprovided respectively with an axial recess and a correspondingly shapedaxial projection .tting into said recess, and with longitudinallyextending aligned side recesses, the outer ends of each block having achamber, a metallic tube for engaging the cylindrical surface of a lampplug and a contact member for engaging the central terminal thereof ineach said chamber, a bridge in each side recess, a screw passing throughone block and having its head engaging Vthe metallic tube in the chamberthereof and its end threaded'to the bridge in the side recess of theother block, afs'crew passing through the second block and having itshead engaging the metallic tube in the chamber thereof and its endthreaded to said bridge, a screw passing through the first block andhaving its head engagingthe contact member in the chamber thereof andits end threaded to the bridge in the side recess of said block, a screwpassing through the second block and having its head engaging thecontact member in the chamber thereof and its end threaded to the bridgein the side recess of the first block, and means for clamping saidblocks together.

2. A show-case-reflector lamp-socket comprising in combination twoblocks of in'sujlating material, the juxtaposed inner ends of saidblocks being provided respectively with an axial recess and acorrespondingly shaped axial projection fitting .into said recess, andwith longitudinally extending aligned side recesses, the outer ends of'each block having a chamber, a metallic tube for engaging thecylindrical surface of a lamp plug and a contact member for engaging thecentral terminal thereof in each said chamber, a bridge in each siderecess, a screw passing through one block and having its head engagingthe metallic tube in the chamber thereof and its end threaded to thebridge in the siderece'ss of the other block, a screw passing thri'ighthe second block and having its head engaging the metallic tube inthechamber thereof and its end threaded to said bridge, a screwpassing'through the first 'block and having its head engaging theVvContact member inthe gse chamber thereof and its endthreaded to thebridge in the side recessI of said block, a screw passing through thesecond block and having its head engaging the contact member in thechamber vthereof and its end threaded to the bridge in the side recessof the first block, an elongated nut in a longitudinally extendingrecess in one block, and longitudinally disposed screws passing lthrough said blocks and engaging said nut.

8. A show-ease-reflector lamp-socket comprising in combination twoblocks of insulating material, the juxtaposed inner ends of said blocksybeing provided respectively with an axial recess and a correspondinglyshaped axial projection fitting into said recess, and withlongitudinally extending aligned side recesses, the outer ends of eachblock having a chamber, a metallic tube for engaging the cylindricalsurface of a lamp plug and a contact member for engaging the centralterminal thereof in each said chamber, a bridge in each side recess, ascrew passing through one block and having its .head engaging themetallic tube in the chamber thereof and its end threaded to the bridgeinthe-side recess i of the other block, a screw passing through thesecond block and having its head engaging the -metallic tube in thechamber thereof and its end threaded to said bridge,a screwpassingthrough the first block and having its head engaging the contactmember in the chamber thereof and its end threaded to the bridge in theside recess Aof said block, a screw passing through the -secondblocl andhaving its head engaging Ythe contact member in the chamber thereof andits end threaded to the bridge in the side recess of v the first block,means for clamping said blocks together, a flat nut in a lateral recessin one block below the side recess thereof,

and a screw passing throughsaid side recess and having its endthreadedto said nut, the

head of said screw projecting above said block for securing the socketto a support.

In testimony whereof, I have hereunto subscribed my'name this 3rd day ofJune,

LEONARD ERIKSON.

